Design and synthesis of unsymmetric phosphinated diamines for high-Tg, transparent polyimides
作者:Hou Chien Chang、Sheng Lung Chang、Ching Hsuan Lin、Sinn Wen Chen
DOI:10.1016/j.polymer.2012.02.037
日期:2012.4
oxaphosphorin-6-yl)ethane (2), were prepared via a facile, one-pot reaction of DOPO, 4-aminoacetophenone and 2-tertbutylaniline or 2-anisidine in the presence of p-toluenesulfonic acid. Based on diamines (1–2), a series of unsymmetric polyimides (3–4) were prepared in NMP/xylene by high-temperature solution polymerization. Transparency polyimides 3–4 with flexibility, organo-solubility, high-Tg values (310–384 °C)
两种次膦酸二胺1-(4-氨基苯基)-1-(3-叔丁基-4-氨基苯基)-1-(6-氧代-6H-二苯甲 <1,2>氧代磷精-6-基)乙烷(1)和1-(4-氨基苯基)-1-(3-甲基--4-氨基苯基)-1-(6-氧化-6H-二苯甲 <1,2>氧磷磷-6在对甲苯磺酸存在下,通过DOPO,4-氨基苯乙酮和2-叔丁基苯胺或2-苯胺的简便,一锅反应制备2-基)乙烷(2)。在二胺(1-2)的基础上,通过高温溶液聚合在NMP /二甲苯中制备了一系列不对称聚酰亚胺(3-4)。透明度的聚酰亚胺3 - 4具有挠性,有机溶解性,高-T克可以达到(310–384°C)的热值和中等的热性能(T d 5 wt%,氮气:461–477°C;空气,456–474°C)。我们发现,聚酰亚胺薄膜的透明度与联苯次膦次膦酸酯侧基的取向有关,并且该取向受邻位取代基的体积的影响。